The S4 is outfitted with a dynamic 333-hp 3.0-liter supercharged V6 engine with FSI direct fuel injection. A standard six-speed manual transmission and Audi's quattro all-wheel drive system transfer power to the ground; a seven-speed S tronic automatic transmission, including manual gear selection and paddle shifters, is optional. The S4 comes with a power sunroof, 18-inch alloy wheels and performance tires, Xenon plus headlights, LED tail lamps, heated front sport seats, leather/simulated suede upholstery, three-zone climate control, satellite radio, Bluetooth wireless connectivity and an Audi Music Interface with iPod integration. An available Prestige package boasts 19-inch alloy wheels, voice-activated navigation, DVD player, Bang & Olufsen premium sound, HD radio and Advanced Key passive entry/start. Standard safety features include electronic stability and traction control systems, four-wheel anti-lock disc brakes with brake assist, front side-impact airbags, overhead curtain airbags for front and rear passengers, and a tire pressure monitor; rear side-impact airbags are optional. Following a complete redesign last year, the Audi S4 carries over with minimal changes for 2011. A new Titanium Sport Package with unique 19-inch wheels is offered, and the Prestige option group now includes HD radio.